Standing just 20inches tall, the horse attracted huge media interest when he was born in April last year.

Thousands lined up at a farm in Barnstead, New Hampshire for a glimpse of him, but while human interest was high, he didn’t have many friends of his own breed.

Now his quest to find buddies and his life at home with owners Charlie Cantrell and Rachel Wagner in Gilmanton, New Hampshire, will be published in a new a book to celebrate his birthday.

‘This has been a remarkable year for us and for Einstein,’ said Mr Cantrell, 44, who bought Einstein for their small farm along with his wife Rachel.

‘We are both horse enthusiasts and we decided to get ourselves a miniature horse from the renowned breeder Judy Smith at a Miniature Horse Farm in New Hampshire.

‘Einstein is the smallest horse on record ever to survive and when the news got out to the media the level of interest was incredible.

‘The average weight of a newborn miniature horse is eighteen pounds. The average height at birth is twenty-one inches.
Einstein is all the remarkable because he shows no dwarf characteristics and is simply a very small miniature horse.
His mother Finesse stands a relatively tall 32 inches and his dad Painted Feather measures 30 inches.

‘Guinness approached us straight after the original press that surrounded Einstein,’ said Mr Cantrell.

‘He can’t be officially recognized as the smallest stallion until he is four, but we are both relatively sure that he has stopped growing.’

With the press surrounding him, it wasn’t long before Einstein did make friends – of all shapes and sizes.

Living peacefully in his own pen on his owners land, Einstein’s first birthday is something that GP Rachel and Charlie can’t wait to share.

‘He loves children and they of course love him,’ said Charlie.

‘They get wide eyed because they have never seen a horse this size before and they want to smother him.

‘However, he is so small, so hopefully the book will satisfy everyone’s desire to see Einstein and his cute and unusual life.’